S355NL
1.0546Normalized fine-grain structural steel with 355 MPa yield and -50°C impact toughness. The most widely used fine-grain grade in EN 10025-3. Workhorse for offshore, bridges, cranes, and wind turbine towers in cold climates. Better low-temp toughness than S355J2.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | ASTM | USA | ASTM A572 Gr 50 (approx) | — | REF |
| 🇪🇺 | EN | Europe | S355NL | 1.0546 | 100% |
Sources: ASTM A572, EN 10025-3:2019
Chemical composition comparison (wt%)
Side-by-side: S355NL (EN) (EN 10025-3:2019) vs S355NL (EN) (EN 10025-3:2019)
| Element | S355NL (EN) | S355NL (EN) | Overlap |
|---|---|---|---|
| C | 0–0.18% | 0–0.18% | OK |
| Si | 0–0.5% | 0–0.5% | OK |
| Mn | 1–1.65% | 1–1.65% | OK |
| P | 0–0.025% | 0–0.025% | OK |
| S | 0–0.02% | 0–0.02% | OK |
| Ni | 0–0.5% | 0–0.5% | OK |
| V | 0–0.12% | 0–0.12% | OK |
| Nb | 0–0.05% | 0–0.05% | OK |
Mechanical properties
Normalized
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 470–630 | MPa |
| Yield Strength | ≥ 355 | MPa |
| Elongation | ≥ 22 | % |
| Elastic Modulus | ≥ 210 | GPa |
| Density | ≥ 7.85 | g/cm3 |
Related materials
S355JR
1.0045High-strength low-alloy structural steel with minimum yield strength of 355 MPa. Standard grade for bridges, buildings, cranes, and general structural applications. Impact tested at +20°C (JR).
S690QL
1.8928High-strength quenched and tempered fine-grain structural steel with minimum yield strength of 690 MPa. Used for heavily loaded structures like mobile cranes, mining equipment, bridges, and pressure vessels.
S275JR
1.0044Medium-strength structural steel with minimum yield strength of 275 MPa. Bridges the gap between S235JR and S355JR. Used for general structural applications, lattice towers, masts, and light crane components. Impact tested at +20°C (JR).
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